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Proof step 3 from proof div2-zero (previous step)

i / 2 = 0 ⊦ i = 0, i = 1, i = ~1

User applied rule cut formula

And obtained the following new goals

Proof step 4:
i < 0, i / 2 = 0 ⊦ i = 0, i = 1, i = ~1

Rule argument

fma: i < 0

Additional information

Used simplifier rules: div-two-zero: ⊦ 0 < i → (i / 2 = 0 ↔ i = 1);%lst-01: ⊦ ¬ i < j → (i ≠ j ↔ j < i); from specification int-basic1 Used formulas: i < 0